Robbie Lawler hasn't sparred in 5 years?

Found this article on Reddit. It says that Robbie Lawler hasn's sparred in 5 years and Johnny Hendricks doesn't take head shots in training. Supposedly could mean big things for the future of MMA. IF they'd bothered to explain how they do actually train. http://bleacherreport.com/articles/1...is_shared=true

What are these safe but effective training methods the article alluded to but never described?

...I went through a patch where I did not spar for the longest time,...

...In that patch, I was knocking a lot of people out. I just think the further that I got away from that at the higher level, it was harder to be sharp, or as sharp as I could be. So sparring was something I needed to do when I came back to the UFC.